JPH0624031A - Recording device - Google Patents

Abstract

PURPOSE:To make it possible to execute recording with high speed by making a device simple through mounting an electrically conductive roller which transfers an ink image onto a recording medium by application of a voltage on a back side face of the recording medium, in opposing position against an uneven plane and in a relative position against an electrode. CONSTITUTION:There is rotating an ink holding body 1 having a water repellent and insulated layer with an uneven plane 7, a scanning action is executed on the ink holding body 1 with such condition that a pin electrode 9 in a holder 8 and an ink feeding roller 11 hold a relative position. The ink feeding roller 11 is electrically earthed, therefore, if a voltage is supplied to an optional pin electrode 9, an electrostatic power acts on ink. In this case, as an electrostatic power acts strongly on ink at a recess portion of the plane 7, the ink separates from the ink feeding roller 11 and adheres onto the recess portion. Then, an ink image is formed on the ink holding body 1, but, in ink, an electrostatic power so acts as to transfer all the ink on the ink holding body 1 onto a recording medium 12 and a recording can be executed. In this case, as a line recording is executed by using the pin electrodes 9 which are linearly arranged, a high speed recording becomes possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device used in office automation equipment such as personal computers and word processors. As printers for office automation equipment such as personal computers and word processors, electrophotographic, ink jet, thermal transfer recording, wire dot, and other recording devices have been put into practical use, and are used in fields that take advantage of their respective characteristics.

Among these recording devices, electrophotographic and ink jet recording devices are expected to become the mainstream in the future because of their features such as noiselessness and low running cost.

[0003]

2. Description of the Related Art Generally, an electrophotographic recording apparatus exposes a uniformly charged surface of a photosensitive member with a laser or the like according to image information to form light, forms an electrostatic latent image, and then forms a toner carrier. The electrostatic latent image is visualized, that is, developed, and the visible image of this toner is electrically transferred to the recording paper. After copying it with various forces, it is fixed with heat, pressure, light, etc. to obtain a copy or print.

On the other hand, the ink jet recording apparatus is roughly classified into three types: continuous jet type, electrostatic suction type and on-demand type. In the continuous ejection type, recording is performed by charging and deflecting ink that is continuously ejected, so that the device becomes complicated and an ink recovery and cleaning device is also required. The electrostatic attraction type has a relatively simple structure, but requires a high voltage, which is dangerous.
Moreover, the physical properties of the ink such as conductivity are often limited and the frequency response is poor.

On the other hand, the on-demand type discharges ink droplets only when necessary by generating pressure by a discharge energy generating element such as a piezoelectric element and a heat generating element.
The structure is very simple.

[0006]

However, in the electrophotographic recording apparatus, since the toner is used as the color material, the heat source is required when fixing the toner onto the recording paper, and thus the recording process is complicated, so that the apparatus is used. Is complicated. On the other hand, in the inkjet recording apparatus, since the recording principle is simple, the apparatus can be made small and lightweight, but there is a problem that the recording speed is slow because line recording is difficult.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a recording apparatus which is simple in apparatus and capable of high-speed recording.

[0008]

FIG. 1 is a diagram for explaining the principle of the present invention. In FIG. 1, reference numeral 1 denotes an ink holder having a water repellent insulating layer having an uneven surface 7, and 11 denotes an ink supply roller impregnated with the liquid ink, which is provided in contact with the uneven surface 7 while scanning the uneven surface 7. 8 is the ink holder 1
A holder 3 for holding a plurality of pin electrodes 9 for forming an ink image by applying a voltage by scanning a smooth surface of the back surface of the electrode 3 in synchronization with the ink supply roller 11 is an electrode provided in contact with the smooth surface. , 16 are conductive rollers which are provided at the relative position of the electrode 3 so as to face the concave-convex surface 7 and which are provided on the back surface of the recording medium 12 and transfer the ink image to the recording medium 12 by applying a voltage.

[0009]

The ink holder rotates, and the pin electrode in the holder and the ink supply roller scan the ink holder while maintaining their relative positions. The ink supply roller is electrically grounded, and when a voltage is applied to any pin electrode, an electrostatic force acts on the ink. In this case, since the electrostatic force strongly acts on the ink in the concave portion of the uneven surface, the ink is separated from the ink supply roller and adheres to the concave portion.

In this way, an ink image is formed on the ink holder. A voltage is applied to the conductive roller provided facing the uneven surface via the electrode that is in contact with the smooth surface of the ink holding body and the ink holding body. All the ink in the holder is transferred to the recording medium and recording is performed. In the present invention, since the liquid ink can be used, the heat source required for using the toner is not required as compared with the electrophotographic recording apparatus, so that the apparatus can be made compact and lightweight.

Further, since line recording can be performed by the pin electrodes arranged in a line, high-speed recording can be performed as compared with an ink jet recording apparatus, and furthermore, ink is transferred to recording paper by an electric field, so that Ink can also be transferred to rough recording paper.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 2 and 3 are diagrams showing an embodiment of the present invention. First, the configuration will be described. In FIG. 2, reference numeral 1 denotes an ink holder, and the ink holder 1 is configured as a belt having an endless structure and rotates. That is, the ink holder 1 is always conveyed at a constant speed by the feed rollers 2 and 3.

As shown in FIG. 3, the ink holder 1 comprises a polyethylene terephthalate film 4 coated with a photosensitive resin 5, an uneven surface formed by etching, and a water repellent insulating layer 6 formed by Teflon. The uneven surface 7 is held. Reference numeral 8 denotes a holder for scanning the smooth surface of the back surface of the ink holder 1, and pin electrodes 9 are densely embedded in the holder 8 in a line. Reference numeral 10 is a switch circuit composed of a switching array, and the switch circuit 10 can apply a voltage to the pin electrode 9 at an arbitrary position.

Reference numeral 11 denotes an ink supply roller. The ink supply roller 11 is provided at a position facing the pin electrode 9 with the ink holder 1 interposed therebetween, and scans the uneven surface 7 of the ink holder 1. The ink supply roller 11 is provided in contact with the uneven surface 7, and is impregnated with a water-based ink (liquid ink) used in a general inkjet recording apparatus. The ink supply roller 11 is made of urethane sponge.

The ink supply roller 11 and the pin electrode 9 scan the ink holder 1 while maintaining their relative positions. When a voltage is applied to an arbitrary pin electrode 9, an electrostatic force acts on the ink and a strong electrostatic force acts on the ink in the concave portions of the uneven surface 7, so that the ink is separated from the ink supply roller 11.
Adhere to the recess. Thus, the uneven surface 7 of the ink holder 1
An ink image is formed on the.

The feed roller 3 has a function as an electrode, is brought into contact with the smooth surface of the back surface of the ink holder 1, and is made of conductive rubber. Reference numeral 12 is a recording paper as a recording medium, and the recording paper 12 is conveyed by the paper conveying rollers 13 to 15 at the same speed as the ink holder 1. Reference numeral 16 denotes a chromium conductive roller provided at a position opposed to the feed roller 3 with the recording paper 12 interposed therebetween. A voltage is constantly applied to the conductive roller 16 from a power source 17.

Therefore, an electrostatic force acts on the ink, and all the ink on the uneven surface 7 of the ink holder 1 is transferred to the recording paper 12. The recording paper 12 may be in contact with the ink holder 1 as shown in FIG. In this case, the voltage applied to the conductive roller 16 can be lowered.

Next, the operation will be described. First, the ink holder 1 is rotated by the feed rollers 2 and 3. The pin electrode 9 and the ink supply roller 11 in the holder 8 are the ink holder 1
The ink holding body 1 is scanned while holding the relative position with the ink sandwiched therebetween. The ink supply roller 11 is electrically grounded, and the switch circuit 10 causes the pin electrode 9 at a predetermined position.
When a voltage is applied to the ink, an electrostatic force acts on the ink. In this case, since the electrostatic force strongly acts on the ink in the concave portion of the uneven surface 7, the ink is separated from the ink supply roller 11,
Adhere to the recess. Thus, the uneven surface 7 of the ink holder 1
An ink image is formed on.

Next, the recording paper 12 is fed to the paper carrying rollers 13-.
It is conveyed by 15 at the same speed as the ink holder 1. The feed roller 3 stored on the smooth surface of the back surface of the ink holder 1.
A voltage is applied to the conductive roller 16 provided at a position opposed to the recording paper 12 with the recording paper 12 interposed therebetween, and an electrostatic force acts on the ink. As a result, all the ink on the uneven surface 7 of the ink holder 1 is transferred to the recording paper 12, and recording is performed.

In this embodiment, since the water-based ink can be used, the heat source required for using the toner is not required as compared with the electrophotographic recording apparatus, so that the apparatus can be made compact and lightweight. Further, since line recording can be performed by the pin electrodes 9 arranged in a line, high-speed recording can be performed as compared with an inkjet recording device, and ink is transferred to the recording paper 12 by an electric field, so Ink can also be transferred to the rough recording paper 12.

Next, FIGS. 4 and 5 are views showing another embodiment of the present invention. In FIG. 4, reference numeral 21 denotes an ink holder, and the ink holder 21 is configured as a belt having an endless structure and rotates. That is, the ink holder 21
Is always conveyed at a constant speed by the feed rollers 2 and 3. As shown in FIG. 5, the ink holder 21 is provided with a photoconductive resin 23 such as polyvinylcarbazole on an aluminum electrode layer (conductive layer) 22 so that the surface becomes uneven, and is further covered with Teflon. By providing the water-based insulating layer 6,
The uneven surface 7 is formed.

Reference numeral 24 denotes a light source, and the light source 24 illuminates the uneven surface 7 to form a latent image by light on the ink holder 21. Reference numeral 25 denotes a conductive roller that scans the back surface of the ink holder 21. The conductive roller 25 applies a constant voltage from a power source 26 to form an ink image. Reference numeral 11 denotes an ink supply roller. The ink supply roller 11 is provided at a position facing the conductive roller 25 with the ink holding body 21 interposed therebetween, and scans the uneven surface 7 of the ink holding body 21. The ink supply roller 11 is provided in contact with the uneven surface 7 and is impregnated with a water-based ink used in a general inkjet recording apparatus. The ink supply roller 11 is made of urethane sponge.

Ink supply roller 11 and conductive roller 25
Scans on the ink holder 21 while maintaining the relative position. When a constant voltage is applied to the conductive roller 25, an electrostatic force acts on the ink and a strong electrostatic force acts on the ink in the concave portions of the uneven surface 7, so that the ink is applied to the ink supply roller 1.
Separated from 1 and attached to the recess. In this way, an ink image is formed on the uneven surface 7 of the ink holder 21.

The feed roller 3 has a function as an electrode, is brought into contact with the smooth surface of the back surface of the ink holder 21, and is made of conductive rubber. Reference numeral 12 is a recording paper as a recording medium, and the recording paper 12 is conveyed by the paper conveying rollers 13 to 15 at the same speed as the ink holder 21. Reference numeral 16 denotes a chromium conductive roller provided at a position opposed to the feed roller 3 with the recording paper 12 interposed therebetween. A voltage is constantly applied to the conductive roller 16 from a power source 17.

Therefore, an electrostatic force acts on the ink, and all the ink on the uneven surface 7 of the ink holder 21 is transferred to the recording paper 12. The recording paper 12 is, as shown in FIG.
It may be in contact with the ink holder 21. In this case, the voltage applied to the conductive roller 16 can be lowered.

First, the ink holder 21 is rotated by the feed rollers 2 and 3. Then, the uneven surface 7 is irradiated with light by the light source 24 to form a latent image of light. The ink supply roller 11 is electrically grounded, and the conductive roller 25
When a voltage is applied to the ink, an electrostatic force acts on the ink. In this case, since the electrostatic force strongly acts on the ink in the concave portion of the uneven surface 7, the ink is separated from the ink supply roller 11,
Adhere to the recess. In this way, an ink image is formed on the uneven surface 7 of the ink holder 21.

Next, the recording paper 12 is fed to the paper carrying rollers 13-.
It is conveyed at the same speed as the ink holder 21 by 15. A voltage is applied to the conductive roller 16 provided at a position facing the feed roller 3 which is stored on the smooth surface of the back surface of the ink holding body 21 with the recording paper 12 interposed therebetween, and electrostatic force acts on the ink. . As a result, the uneven surface 7 of the ink holder 21 is
All the ink is transferred to the recording paper 12 and recording is performed.

Also in the present embodiment, since the water-based ink can be used, the heat source required for using the toner is not required as compared with the electrophotographic recording apparatus, so that the apparatus can be made compact and lightweight. In addition, since line recording can be performed by forming a latent image by the light source 24, high-speed recording can be performed as compared with an inkjet recording device, and ink is transferred to the recording paper 12 by an electric field. Ink can also be transferred to the recording paper 12 having a rough surface.

[0029]

As described above, according to the present invention, the apparatus can be made smaller and lighter than the electrophotographic recording apparatus, and high speed recording can be performed as compared with the ink jet recording apparatus. In addition, the ink can be transferred to recording paper having a rough surface.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of the present invention.

FIG. 2 is a diagram showing an embodiment of the present invention.

FIG. 3 is a sectional view of an ink holder.

FIG. 4 is a diagram showing another embodiment of the present invention.

FIG. 5 is a sectional view of an ink holder.

[Explanation of symbols]

 1, 21: Ink holder 2: Feed roller 3: Feed roller (electrode) 4: Polyethylene terephthalate film 5: Photosensitive resin 6: Repellent insulating layer 7: Rough surface 8: Holder 9: Pin electrode 10: Switch circuit 11 : Ink supply roller 12: Recording paper (recording medium) 13 to 15: Paper transport roller 16, 25: Conductive roller 17, 26: Power supply 22: Aluminum electrode layer (conductive layer) 23: Photoconductive resin 24: light source

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B41J 2/45 2/455 H04N 1/29 H 9186-5C 7246-2C B41J 3/21 L

Claims (2)

[Claims] 1. An ink holder (1) having a water repellent insulating layer whose surface is an uneven surface (7), and a liquid ink which is provided in contact with the uneven surface (7) while scanning the uneven surface (7). And an ink supply roller (11) impregnated with a plurality of pins for scanning the smooth surface of the back surface of the ink holder (1) in synchronization with the ink supply roller (11) to form an ink image by applying a voltage. A holder (8) for holding the electrodes (9) side by side
An electrode (3) provided in contact with the smooth surface, and a voltage provided on the back surface of the recording medium (12) at a relative position to the electrode (3) and facing the uneven surface (7). A recording apparatus comprising a conductive roller (16) which transfers the ink image to a recording medium (12) when applied. 2. An ink holder (21) comprising a conductive layer (22), a photoconductive layer (23) having an uneven surface and a water repellent insulating layer (6) holding the uneven surface (7), A light source (24) that irradiates the uneven surface (7) with light to form a latent image, and an ink supply that is provided in contact with the uneven surface (7) while scanning the uneven surface (7) and impregnated with liquid ink. A roller (11) and a conductive roller (25) for scanning a smooth surface of the back surface of the ink holder (21) in synchronization with the ink supply roller (11) and forming an ink image by applying a voltage.
An electrode (3) provided in contact with the smooth surface, and a voltage provided on the back surface of the recording medium (12) at a relative position to the electrode (3) and facing the uneven surface (7). A recording apparatus comprising a conductive roller (16) for transferring the ink image onto a recording medium (12) by applying a voltage.